U.S. Border Patrol agents in the Tucson Sector have rescued 177 people in the Southern Arizona desert in the last 30 days.

Officials of Border Patrol Search, Trauma and Rescue, known as BORSTAR, said 52 were rescued in the past week. Daytime temperatures have been well above 100 degrees since June 1.

All those rescued were trying to cross the border and were unable to continue because of heat-related illnesses, officials said.

Southern Arizona is the busiest region along the border for illegal crossings, and it has claimed more than 2,100 lives since 2000 as people cross with inadequate food, water and clothing and lose their way or are abandoned by paid smugglers.

BORSTAR in the Tucson Sector has more than 250 agents who are cross-trained as emergency medical technicians and certified as first responders.

The Tucson Sector maintains 22 rescue beacons throughout the area to assist those in distress.